2189709907488 has 60 divisors (see below), whose sum is σ = 6439876020270. Its totient is φ = 729903301632.

The previous prime is 2189709907457. The next prime is 2189709907507. The reversal of 2189709907488 is 8847099079812.

It can be written as a sum of positive squares in only one way, i.e., 2186766627984 + 2943279504 = 1478772^2 + 54252^2 .

It is a super-2 number, since 2×2189709907488² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 422395153 + ... + 422400336.

Almost surely, 2^{2189709907488} is an apocalyptic number.

It is an amenable number.

2189709907488 is an abundant number, since it is smaller than the sum of its proper divisors (4250166112782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2189709907488 is an equidigital number, since it uses as much as digits as its factorization.

2189709907488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844795511 (or 844795494 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 72.

The spelling of 2189709907488 in words is "two trillion, one hundred eighty-nine billion, seven hundred nine million, nine hundred seven thousand, four hundred eighty-eight".